Màquines Simples
Quiz
•
Instructional Technology
•
9th Grade
•
Practice Problem
•
Medium
MARC GIL
Used 10+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Calcula el treball (W) que fa una persona que aguanta una ampolla de 100N d'aigua durant 3 minuts
300 Joules
980 Joules
2949 Joules
No fa cap treball
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Quin treball faig per transportar una caixa de 800 kg durant una distància de 3 metres?
2400 Joules
23520 Joules
7840 Joules
No fa cap treball
Answer explanation
Recorda! W(treball)= F (força) · D (distància)
Pes= 800 kg
Distàncica= 3 metres
F= 800*9,8= 7840 N
W= 7840*3=23520 Joules!
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Calcula la potència que ha de tenir el motor d'una grua, per aixecar una caixa de 500 Newtons de força una distància de 8 metres si tarda 10 segons.
500 Watts
3920 Watts
625 Watts
400 Watts
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Quina força pot fer una grua com a màxim si per desplaçar una caixa 20 metres fa un treball de 20.000 Joules?
1000 Newtons
400 000 Newtons
2000 Newtons
300 000 Newtons
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
El motor d'una màquina de tallar els cabells consumeix una potència de 300 Watts. El motor i els mecanismes perden una potència de 30 Watts en soroll i escalfament de la màquina. Calcula el rendiment del motor.
83,3 %
90 %
107,14 %
93,3 %
6.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Una palanca és una màquina simple que està formada per una barra i un....
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Quin tipus de palanca és la de la imatge
1r Grau
2n Grau
3r Grau
4t Grau
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